 Anastomotic leakage is a common complication following gastrectomy, with surgery being the most effective treatment option when it occurs. Depending on the severity of the leakage, either conservative or surgical treatments can be used. Conservative treatments include draining the area through a percutaneous drain, while more severe leaks may require endoscopic interventions such as clips, vacuums, or stents. When the leakage is too severe or the patient's vital signs are unstable, surgical treatment must be performed. Surgical options depend on the location of the leakage, but generally involve removing the affected portion of the stoma and reconnecting the remaining portions. This article was authored by Seng Ho-Jong, Jin Kwon Lee, Kyung Won Seo, and others.